北方寒冷地区封闭渡槽粘贴聚氨酯板提高保温效果  

Increase insulation effect of polyurethane board pasting on closed aqueduct surface in cold regions

作　　者：刘德仁[1,2] 张东[3] 张世民[2] 

机构地区：[1]兰州交通大学土木工程学院,兰州730000 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,兰州730000 [3]甘肃省水利水电勘测设计研究院,兰州730000

出　　处：《农业工程学报》2013年第9期70-75,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(40730736;40821001;51268033);中国科学院西部行动计划项目(KZCX2-XB2-10);冻土工程国家重点实验室自主项目(SKLFSE-ZY-01)资助;长江学者和创新团队发展计划资助(IRT1139)

摘　　要：为了研究封闭渡槽在冬季低温环境下的安全运行状况,结合中国北方寒冷地区某无压输水渡槽工程实际,通过在室内环境箱中进行渡槽比例模型试验,研究了渡槽在冬季输水过程中,水流温度受外界环境温度及流速的影响。为保证渡槽在冬季寒冷条件下的安全运行,在渡槽模型表面粘贴聚氨酯保温材料,研究了聚氨酯保温板对渡槽的保温效果,并与不粘贴保温材料时渡槽内的水流温度进行了对比。经试验发现,渡槽外壁黏贴聚氨酯保温板在防止渡槽水流温度降低方面的作用明显,减小了约45%的水流温度降低值,研究成果可为北方寒冷地区同类型工程的设计与安全运营提供参考。Areas of northern China are mainly in the temperate monsoon climate zone and temperate continental climate zone, it is cold in winter, and the air temperature is low, which has a big influence on water diversion facilities, especially aqueduct. As for closed aqueduct water diversion projects which need to be operated in winter with non-pressure water delivery in cold regions of northern China, it is of great significance to study and research the safe operation under low temperature environment in winter. With the rapid development of the construction of water diversion projects, the original research results about aqueducts mainly lie in the structural stress of the aqueduct, then the effects of fluid-solid coupling, earthquake, wind and temperature stress, and other factors are gradually considered, seismic and reliability theory is also introduced into the design of diversion facilities. For water diversion projects in northern China, the problem of the safety of water diversion under low temperature environments in winter should also be considered. The present study in freezing disease of water diversion project and safety operation in winter is relatively less, which are mainly in the fields of monitoring analysis and numerical calculation analysis. In this paper, according to an aqueduct engineering practice with non-pressure water delivery in cold region of northern China, a scale model test of an aqueduct is undertaken in an indoor environment cabinet to study the anti-freezing and insulation effects of pasting polyurethane insulation board on the surface of the aqueduct under low temperature environment in winter. In order to study the insulation effects of polyurethane insulation board on aqueduct, the tests are mainly divided into two cases： pasting and without pasting polyurethane insulation board on the surface of the aqueduct model. By the tests, the influence of the external environment temperature and rate of flow on water flow temperature during the process of water delivery of the aqueduct in

关 键 词：温度 模型 试验 寒冷地区 渡槽 聚氨酯保温板 保温效果 

分 类 号：TV91[水利工程—水利水电工程]